fix: resolve mermaid elk diagram error, upgrade high-res appicon and complete rebranding to G-Launcher/GaCy

Doc/ARCHITECTURE.md

@@ -8,25 +8,25 @@
 
 ```mermaid
 graph TD
-    subgraph Frontend["Frontend Layer (React 19 + TypeScript + Vite)"]
-        UI["React UI (DaisyUI 5 + Tailwind 4)"]
-        Stores["Zustand Stores (launcherStore, modalStore)"]
-        Bindings["Auto-generated TypeScript Bindings (@bindings/...)"]
+    subgraph FrontendLayer [Frontend Layer: React 19 and TypeScript]
+        UI[React UI: DaisyUI 5 and Tailwind 4]
+        Stores[Zustand Stores: launcherStore, modalStore]
+        Bindings[TypeScript Bindings]
         UI <--> Stores
         Stores <--> Bindings
     end
 
-    subgraph IPC["Wails v3 IPC & Event Gateway"]
-        IPCBridge["Typed IPC Calls & Event Subscriptions"]
+    subgraph IPCLayer [Wails v3 IPC and Event Gateway]
+        IPCBridge[Typed IPC Calls and Event Subscriptions]
         Bindings <--> IPCBridge
     end
 
-    subgraph Backend["Backend Layer (Go 1.24 Core Services)"]
-        AppSvc["AppService (Window controls, Version info)"]
-        FSSvc["FSService (Safe IO, Game path persistence)"]
-        GitSvc["GitService (Updater, MinGit runtime, Proxies)"]
-        DiffSvc["DiffService (Protobuf diffs, HPatchz, Zift)"]
-        LangSvc["LanguageService (Thai asset modding & ExcelData)"]
+    subgraph BackendLayer [Backend Layer: Go 1.24 Core Services]
+        AppSvc[AppService - Window controls]
+        FSSvc[FSService - Safe IO and Game Path]
+        GitSvc[GitService - Updater and MinGit]
+        DiffSvc[DiffService - Protobuf Diffs and HPatchz]
+        LangSvc[LanguageService - Asset Modding]
         
         IPCBridge <--> AppSvc
         IPCBridge <--> FSSvc
@@ -35,11 +35,11 @@ graph TD
         IPCBridge <--> LangSvc
     end
 
-    subgraph OS["OS & Filesystem Integration"]
-        GameExe["Game Process (StarRail.exe / Unity)"]
-        ConfigDir["%APPDATA%/g-launcher (game-selection.json)"]
-        ToolsDir["tools/ (MinGit, Go, Node.js portable)"]
-        AssetsDir["bin/ (7za.exe, hpatchz.exe, zift.exe)"]
+    subgraph HostSystem [System and Filesystem Integration]
+        GameExe[Game Process: StarRail.exe]
+        ConfigDir[APPDATA User Config]
+        ToolsDir[Portable Tools: MinGit and Node]
+        AssetsDir[Binary Tools: 7za and HPatchz]
     end
 
     FSSvc --> GameExe